[Ultrasonic Repellent] This is our advanced version. Using ultrasonic theory, changing frequency to stimulate the auditory system of mosquito and other pests, make them unbearable and feel uncomfortable. * [Safe] The product is non-toxic and environmentally friendly, it is 100% safe and harmless to pregnant women, babies, children and pets. It is safe and only affects rodents and pests. It does not emit electromagnetic waves! It is safe for your family. * [Easy to Use] The repellent plug plugs into an electrical outlet and emits inaudible ultrasound directly. No adjustment is necessary. A height of about 20-80cm above the ground is ideal for crawling pests and between for flying pests. *[Wide Coverage Area] This ultrasonic pest controller is effective in a range from 80 to 120 square meters. This pesticide can be used anywhere in the house, for example in the kitchen, bedroom, basement, garage, warehouse, etc. Ultrasonic devices cannot pass through the wall, installation of a control